// Copyright (c) 2010 Satoshi Nakamoto

// Copyright (c) 2009-present The Bitcoin Core developers

// Distributed under the MIT software license, see the accompanying

// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef BITCOIN_RPC_REQUEST_H

#define BITCOIN_RPC_REQUEST_H

#include <univalue.h>

#include <util/fs.h>

#include <any>

#include <cstdint>

#include <optional>

#include <string>

#include <vector>

enum class JSONRPCVersion {

    V1_LEGACY,

    V2

};

/** JSON-RPC 2.0 request, only used in bitcoin-cli **/

UniValue JSONRPCRequestObj(const std::string& strMethod, const UniValue& params, const UniValue& id);

UniValue JSONRPCReplyObj(UniValue result, UniValue error, std::optional<UniValue> id, JSONRPCVersion jsonrpc_version);

UniValue JSONRPCError(int code, const std::string& message);

enum class AuthCookieResult : uint8_t {

    Disabled, // -norpccookiefile

    Error,

    Ok,

};

/**

 * Generate a new RPC authentication cookie and write it to disk

 * @param[in] cookie_perms Filesystem permissions to use for the cookie file.

 * @param[out] user Generated username, only set if `OK` is returned.

 * @param[out] pass Generated password, only set if `OK` is returned.

 * @retval AuthCookieResult::Disabled Authentication via cookie is disabled.

 * @retval AuthCookieResult::Error Error occurred, auth data could not be saved to disk.

 * @retval AuthCookieResult::Ok Auth data was generated, saved to disk and in `user` and `pass`.

 */

AuthCookieResult GenerateAuthCookie(const std::optional<fs::perms>& cookie_perms,

                                            std::string& user,

                                            std::string& pass);

/** Read the RPC authentication cookie from disk */

AuthCookieResult GetAuthCookie(std::string& cookie_out);

/** Delete RPC authentication cookie from disk */

void DeleteAuthCookie();

/** Parse JSON-RPC batch reply into a vector */

std::vector<UniValue> JSONRPCProcessBatchReply(const UniValue& in);

class JSONRPCRequest

{

public:

    std::optional<UniValue> id = UniValue::VNULL;

    std::string strMethod;

    UniValue params;

    enum Mode { EXECUTE, GET_HELP, GET_ARGS } mode = EXECUTE;

    std::string URI;

    std::string authUser;

    std::string peerAddr;

    std::any context;

    JSONRPCVersion m_json_version = JSONRPCVersion::V1_LEGACY;

    void parse(const UniValue& valRequest);

    [[nodiscard]] bool IsNotification() const { return !id.has_value() && m_json_version == JSONRPCVersion::V2; };

};

#endif // BITCOIN_RPC_REQUEST_H